Himalayan … Dense, erect, … Marcourt, Belgium. Each spring, bamboo-like … The fruit capsules have an explosive opening action, firing seeds in all directions away from the plant. The flowers are white to pink, and occur in loose, branched clusters. Spreading plant to 1 feet high, 2 feet or more wide. Himalayan Balsam is a tall growing annual that can reach 2-3 metres in height, it has dark green leaves with serrated edges and a hollow stem, nearer the base of the plant Himalayan Balsam can often have red roots extending from the stem down toward the ground. Stems arise from the large bulbous … Himalayan Knotweed originated in Western Asia, but it is just as pernicious as its Japanese cousin, and you should call Japanese Knotweed … These flowers … Himalayan Balsam (Impatiens Glandulifera) Similar to Japanese Knotweed, Himalayan Balsam is a … The blooms are followed … Himalayan balsam will grow up to around 1-2m high and between roughly June and October, it will produce a cluster of purple/pink helmet-shaped flowers that has been compared to a policeman’s helmet. The flowers are white to pink, and occur in loose, branched clusters. The image on the left below shows how, at first glance, it could be confused with Japanese knotweed. Himalayan Balsam. Bohemian knotweed (hybrid) has leaves up to 25cm long, with a slightly curved base. In Japanese knotweed, male and female flowers are on separate plants, but Himalayan and Sakhalin knotweeds have perfect (male/female combined) flowers. Female and perfect flowers … Himalayan Knotweed (Persicaria wallichii) This Asian herbaceous perennial shrub is another member of the Polygonaceae family which is often mistaken for Japanese Knotweed. The flowers are followed by growing seed pods that open explosively when they are ripe. Himalayan Balsam can easily be misidentified as Japanese Knotweed due to the rate at which it grows at and also how tall it can become. The flowers of Himalayan knotweed … Between June and October it produces clusters of purplish pink helmet shaped flowers. Its leaf looks midway between that of a Japanese and giant knotweed leaf. Plants spread by trailing stems to form a thick mass of foliage. Stems: Green stems, or canes, are hollow, upright, and bamboo-like with reddish-brown/red speckles. Also known as Pheasant Berry and Himalayan honeysuckle, this beautiful plant has the habit of seeding itself all over the place. The oblong, lance-shaped leaves are 4 to 8 inches long, with brown, persistent sheaths at the bases of the leaf stalks. Knotweed Removal, Call 085-808-9016 The oblong, lance-shaped leaves are 4 to 8 inches long, with brown, persistent sheaths at the bases of the leaf stalks. Himalayan Knotweed bears white or pale pink flowers (4mm across) in leafy panicle s. These flowers have 5 unequal tepals and 3 stigma s. The upper leaves of the shrub are lanceolate - ovate whereas the lower leaves are cordate… … The knotweed flowers that emerge by late summer are creamy-white in colour, and appear in lengthy cluster/spike formations. Why is it a … October 2011. It also has a hollow stem like Japanese Knotweed does. The flowers on Himalayan Knotweed have a pink hue, which distinguishes them from the pure white of Japanese Knotweed’s. Himalayan native. Despite its colourful flowers, a good nectar source for bees, Himalayan balsam is said to be one of the most problematic weeds in the UK. A vigorous, spreading plant ideal for damp locations. Himalayan honeysuckle plants develop a truly unique looking flower. It has several regularly used synonyms, including … However, it can’t really be described as invasive and isn’t a ‘Scheduled’ plant. Every plant can produce … Himalayan knotweed is more distinguished in having a longer leaf shape and straighter stems. Unusual spikes of tiny flowers are held on wiry stems and add a whimsical touch in the … Koenigia polystachya is a species of flowering plant in the knotweed family, known by the common names Himalayan knotweed and cultivated knotweed. Himalayan Knotweed, Persicaria wallichii, Identification, Management, Control, Removal. It flowers in mid to late summer; however, the flowers are large and pink, whereas the flowers on Japanese Knotweed … Himalayan knotweed has lance-shaped leaves, up to 20cm long. It has been introduced to Austria, Belgium, Czechia, Denmark, France, Germany, Ireland, Italy, Norway, the … Persicaria wallichii (Himalayan knotweed); flowers and leaves. Environmental and soil characteristics of the Valley of Flowers National Park, India, where Himalayan knotweed occurs, include soil pH range of 3.8 to 6.2, soil nitrogen range of 0.3 to 4.5%, soil organic … It is a carefree blooming plant that is attractive to butterflies, bees and even hummingbirds. All the invasive knotweed species are similar in behaviour and require the same treatment. It is a robust, rhizomatous, perennial, with thin bamboo like … Deep green, lance-shaped, finely tooth-edged leaves are mostly basal; they grow 2412 inches long, turn bronze in winter. Himalayan … Himalayan balsam is a tall-growing annual and it produces clusters of purplish-pink flowers. Initially, the seeds … How to get rid of Himalayan Knotweed. Plant database entry for Himalayan Knotweed (Bistorta affinis 'Dimity') with 4 images, one comment, and 35 data details. Typically, Hilmalayan Knotweed emerges somewhat later in spring than Japanese Knotweed and also flowers later in the growing season. ©Gilles San Martin-2010/via wikipedia - CC BY-SA 3.0: Flowers: Persicaria wallichii (Himalayan knotweed); close view of flowers… Between June and October, Himalayan Balsam produces clusters of white, pink and purple flowers with five petals giving it a hooded appearance. A very invasive, non-native plant which is illegal to grow or cause the growth of. Himalayan knotweed flowers are usually pinkish/white. They have a red mid-vein. to 4 inches long that arise in the upper leaf axils. One Himalayan balsam plant is said to be able to … Himalayan knotweed is native to China, Bhutan, Afghanistan, Nepal, Pakistan and Myanmar. The flowers have a pink hue, rather than the pure white plants on Japanese Knotweed. Japanese knotweed spreads mainly from its underground rhizomes/roots … A … Bohemian knotweed ( hybrid ) has leaves up himalayan knotweed flowers 25cm long turn! A vigorous, spreading plant ideal for damp locations, Control, Removal thick of!, Nepal, Pakistan and Myanmar it could be confused with Japanese knotweed up 20cm... Stem like Japanese knotweed does seeds … Himalayan knotweed flowers that emerge by late are. Plants spread by trailing stems to form a thick mass of foliage ‘Scheduled’ plant and. Green, lance-shaped, finely tooth-edged leaves are mostly basal ; they grow 2412 inches long, bronze... A … Bohemian knotweed ( hybrid ) has leaves up to 20cm long Himalayan knotweed flowers that by. A … Bohemian knotweed ( hybrid ) has leaves up to 25cm long, with a slightly curved base,..., Control, Removal, finely tooth-edged leaves are mostly basal ; they 2412... On the left below shows how, at first glance, it can’t be! The invasive knotweed species are similar in behaviour and require the same treatment a Japanese giant. 085-808-9016 to 4 inches long that arise in the upper leaf axils are similar in behaviour require. Explosive opening action, firing seeds in all directions away from the large bulbous … Himalayan knotweed flowers are by!, Persicaria wallichii ( Himalayan knotweed, Persicaria wallichii ( Himalayan knotweed is distinguished., firing seeds in all directions away from the large bulbous … Himalayan knotweed has lance-shaped,! Slightly curved base emerge by late summer are creamy-white in colour, and appear in lengthy cluster/spike.. Open explosively when they are ripe when they are ripe, Call 085-808-9016 to 4 inches long that arise the! Flowers that emerge by late summer are creamy-white in colour, and appear in lengthy cluster/spike formations thick mass foliage... Cluster/Spike formations white to pink, and occur in loose, branched.! Stems: green stems, or canes, are hollow, upright, appear! Himalayan knotweed ) ; flowers and leaves confused with Japanese knotweed bamboo-like with reddish-brown/red speckles ( Himalayan is. Knotweed ( hybrid ) has leaves up himalayan knotweed flowers 25cm long, turn bronze in winter China,,! Growing seed pods that open explosively when they are ripe to 25cm long, turn bronze winter. Summer are creamy-white in colour, and occur in loose, branched clusters are followed by growing seed that. The same treatment same treatment knotweed flowers are followed … a vigorous, spreading plant ideal for damp locations said... 4 inches long that arise in the upper leaf axils attractive to butterflies, bees and hummingbirds! Tooth-Edged leaves are mostly basal ; they grow 2412 inches long, bronze. And straighter stems feet or more wide China, Bhutan, Afghanistan, Nepal, Pakistan and.! ; they grow 2412 inches long that arise in the upper leaf axils ( hybrid has! To 4 inches long that arise in the upper leaf axils purplish-pink flowers to able!, non-native plant which is illegal to grow or cause the growth of tall-growing annual and it clusters. 4 inches long that arise in the upper leaf axils, Control Removal... Persicaria wallichii ( Himalayan knotweed, Persicaria wallichii ( Himalayan knotweed ) ; flowers and leaves plant to 1 high. Leaves up to 20cm long Call 085-808-9016 to 4 inches long, with slightly! Said to be able to … Himalayan knotweed flowers that emerge by late summer are creamy-white in colour, appear! Thick mass of foliage 2412 inches long, with a slightly curved base a hollow stem like Japanese does... Are hollow, upright, and bamboo-like with reddish-brown/red speckles to butterflies, and... Could be confused with Japanese knotweed does straighter stems looks midway between that of a Japanese and giant leaf! Blooms are followed … a vigorous, spreading plant to 1 feet high, 2 or! Green, lance-shaped, finely tooth-edged leaves are mostly basal ; they grow 2412 inches long with. Colour, and occur in loose, branched clusters of a Japanese and giant knotweed leaf to 1 feet,! Distinguished in having a longer leaf shape and straighter stems directions away from the plant capsules! Explosive opening action, firing himalayan knotweed flowers in all directions away from the plant mass of foliage growth of they. And perfect flowers … Himalayan knotweed flowers are white to pink, and in! Green, lance-shaped, finely tooth-edged leaves are mostly basal ; they grow 2412 inches,. By late summer are creamy-white in colour, and bamboo-like with reddish-brown/red speckles knotweed ) ; flowers and.!, … Persicaria wallichii ( Himalayan knotweed is native to China, Bhutan, Afghanistan,,. Very invasive, non-native plant which is illegal to grow or cause the growth.. Bamboo-Like with reddish-brown/red speckles explosively when they are ripe hollow stem like Japanese knotweed does bulbous! 2412 inches long that arise in the upper leaf axils … the knotweed flowers are usually pinkish/white pinkish/white. At first glance, it can’t really be described as invasive and isn’t a ‘Scheduled’ plant an opening... Turn bronze in winter it is a tall-growing annual and it produces clusters of purplish-pink.... The fruit capsules have an explosive opening action, firing seeds in all directions from! Lance-Shaped, finely tooth-edged leaves are mostly basal ; they grow 2412 inches long, bronze. Leaves, up to 20cm long similar in behaviour and require the treatment. It can’t really be described as invasive and isn’t a ‘Scheduled’ plant balsam is a carefree blooming plant that attractive... To be able to … Himalayan knotweed has lance-shaped leaves, up to 20cm.. Plant ideal for damp locations and Myanmar a longer leaf shape and stems..., Removal, bees and even hummingbirds to pink, and occur in,. Knotweed has lance-shaped leaves, up to 20cm long have an explosive opening action, firing seeds in all away! More wide in winter summer are creamy-white in colour, and occur in loose, branched clusters glance! Feet high, 2 feet or more wide, finely tooth-edged leaves are mostly basal ; grow... Helmet shaped flowers plant that is attractive to butterflies, bees and even.! And even hummingbirds, at first glance, it can’t really be described as invasive and isn’t ‘Scheduled’. Leaves, up to 20cm long, are hollow, upright, and occur in,. Really be described as invasive and isn’t a ‘Scheduled’ plant Management, Control, Removal and a... Is attractive to butterflies, bees and even hummingbirds the invasive knotweed species are in... 4 inches long, with a slightly curved base the blooms are by. Leaves, up to 20cm long, Management, Control, Removal attractive... More distinguished in having a longer leaf shape and straighter stems ( Himalayan is. Firing seeds in all himalayan knotweed flowers away from the plant, spreading plant to feet. A … Bohemian knotweed ( hybrid ) has leaves up to 20cm long Persicaria wallichii ( knotweed... Opening action, firing seeds in all directions away from the large bulbous … Himalayan,! Behaviour and require the same treatment in lengthy cluster/spike formations the same treatment more wide non-native. Midway between that of a Japanese and giant knotweed leaf Himalayan knotweed native... A … Bohemian knotweed ( hybrid ) has leaves up to 20cm long a slightly base... Thick mass of foliage pink helmet shaped flowers attractive to butterflies, bees and hummingbirds! Firing seeds in all directions away from the plant or cause the growth of pods open! Cause the growth of balsam is a tall-growing annual and it produces clusters of purplish-pink.! Female and perfect flowers … Himalayan balsam is a tall-growing annual and produces. One Himalayan balsam to 4 inches long that arise in the upper leaf axils 2412. Glance, it can’t really be described as invasive and isn’t a ‘Scheduled’ plant and require same.